Question

用简便方法计算下面各题.

9÷0.125 25.25×0.65×4÷0.65 0.485×102-48.5
= = =
= = =
= = =
=

Answer 1

9÷0.125
=9* 1/8
=9/8

25.25×0.65×4÷0.65
=25.25*4*(0.65/0.65)
=25.25*4*1
=101

0.485×102-48.5
=48.5*1.02-48.5
=48.5*(1.02-1)
=48.5*0.02
=0.485*2
=0.97

Answer 2

9÷0.125 25.25×0.65×4÷0.65 0.485×102-48.5
=9×8÷0.125 ÷ 8 = 25.25×4×0.65÷0.65 =0.485×102-0.485×100
=9×8÷1 =101×1
=72 = 101 =0.485(102-100)
=0.97

Answer 3

9/0.125=9*8/(0.125*8)=72/1=72
25.25*0.65*4/0.65=(25.25*4)*(0.65/0.65)=101*1=101
0.485*102-48.5=0.458*102-0.485*100=0.485*(102-100)=0.485*2=0.97